Genera and species
The World Register of Marine Species lists the following:
Contains the following species:
Balanoglossus apertus (Spengel, 1893)Balanoglossus aurantiacus (Girard, 1853)Balanoglossus australiensis (Hill, 1894)Balanoglossus borealis (Willey, 1899)Balanoglossus capensis (Gilchrist, 1908)Balanoglossus carnosus Müller in Spengel, 1893Balanoglossus clavigerus delle Chiaje, 1829Balanoglossus gigas Müller in Spengel, 1893Balanoglossus hydrocephalus van der HorstBalanoglossus misakiensis Kuwano, 1902Balanoglossus natalensis (Gilchrist, 1908)Balanoglossus occidentalis Ritter, 1902Balanoglossus proterogonius Belichov, 1928Balanoglossus robinii author unknownBalanoglossus salmoneus Belichov, 1928Balanoglossus stephensoni van der Horst, 1937Balanoglossus studiosorum van der HorstContains the following species:
Glossobalanus alatus van der HorstGlossobalanus barnharti Cameron & Ostiguy, 2013Glossobalanus berkeleyi (Willey, 1931)Glossobalanus crozieri van der Horst, 1924Glossobalanus elongatus Spengel, 1904Glossobalanus hartmanae Cameron & Ostiguy, 2013Glossobalanus hedleyi (Hill, 1897)Glossobalanus indicus Rao, 1955Glossobalanus marginatus Meek, 1922Glossobalanus minutus Kowalevsky, 1866Glossobalanus mortenseni van der Horst, 1932Glossobalanus parvulus (Punnett, 1906)Glossobalanus ruficollis (Willey, 1899)Glossobalanus sarniensis (Koehler, 1886)Glossobalanus williami Cameron & Ostiguy, 2013Contains the following species:
Ptychodera bahamensis Spengel, 1893Ptychodera ceylonica author unknownPtychodera erythrea SpengelPtychodera flava Eschscholtz, 1825Ptychodera pelsarti Dakin, 1916